Here's your unbelievably musical compressor, courtesy of Rupert Neve Designs! When you have the 543 in your 500 Series rack, you'll instantly be impressed. After all, this mono compressor has a strong lineage. Not only does it come from the brain of Rupert Neve, but it's also derived from the extremely popular Portico 5043. Now, you can get that unobtrusive, musical-sounding dynamic control into your favorite portable 500 Series format. The 543 sports individually controllable threshold, attack, release, makeup gain, ratio, sidechain highpass filter, Feed-Forward/Feed-Back selection, and Peak/RMS detection modes. When you have the compressor inactive, you can actually use the 543 as a transformer-coupled line amplifier for great results. And when stereo needs come about, just link two 543 units for unbelievable sound. With proven sound, thanks to its big brother in the Portico format, the 543 will be a sound addition to your 500 Series rack.